Fixed a bug in the dtml-var tag handling of the 'null' attribute. Before null...

Fixed a bug in the dtml-var tag handling of the 'null' attribute. Before null would only work correctly if there was also a 'fmt' attribute. Now null correctly works with non-zero false values when there isn't a 'fmt' option.

lib/python/DocumentTemplate/DT_Var.py

@@ -217,8 +217,8 @@ Evaluating expressions without rendering results
    
 
 ''' # '
-__rcs_id__='$Id: DT_Var.py,v 1.35 1999/12/01 23:48:56 jim Exp $'
-__version__='$Revision: 1.35 $'[11:-2]
+__rcs_id__='$Id: DT_Var.py,v 1.36 2000/08/31 23:57:02 amos Exp $'
+__version__='$Revision: 1.36 $'[11:-2]
 
 from DT_Util import parse_params, name_param, html_quote, str
 import regex, string, sys, regex
@@ -280,7 +280,7 @@ class Var:
 
         __traceback_info__=name, val, args
 
-        if val is None and have_arg('null'):
+        if val is None or (not val and val != 0) and have_arg('null'):
             # Treat None as special case wrt null
             return args['null']